JPH0783844B2 - Equipment for processing output material from grinding equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for separating the output of a material crusher into fine materials while at the same time returning coarse material which needs to be finer.

[0002]

BACKGROUND OF THE INVENTION In comminuting coarse materials such as rock, coal and similar objects, crushers tend to discharge the product before comminuting it to the desired uniform size. Heretofore, the crushing device has been provided with a product separating means for passing the desired fines to the outlet and at the same time returning the coarse particles for further fineness. In some cases, the coarse, reconstituted debris accumulates in a mass large enough to interfere with the fines discharged from the mill. This situation is undesirable because the output is disturbed and the power to drive the device to allow the movement of a fairly dense mass of material is increased.

When the material mass increases, effective separation cannot be performed in the following two points. First, if the air flow becomes too fast, large particles will be entrained with the fines and enter the conduit, drifting as an obstacle to uniform flow. If the output conduit is connected to a combustor, the large particles will block combustion in the combustion zone altogether. Secondly, when the mass of material is dense, the power for driving the rotary blade member is rapidly increased, which requires more horsepower.

[0004]

The object of the present invention is to solve the above-mentioned problems.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a device for treating output material from a power actuated grinder to provide the desired substantially uniform fineness particle output in a power actuated grinder. An associated apparatus for separating ground material comprises: (a) a chamber having an inlet and an outlet connected to the grinding device for receiving the output of the ground material from the grinding device; Type drive shaft, and (c) for over-sized particles to be thrown outward by centrifugal force in the chamber and returned to the crusher by gravity to make it finer, to perform a first separation stage of crushed material A bladed rotor, rotatable in the chamber, connected to the drive shaft; and (d) the drive shaft positioned adjacent the outlet of the chamber for performing another stage of separation of ground material. In a row A coupled rotor cage having means for passing a predetermined size of comminuted material particles to the outlet of the chamber, (e) creating an air flow through the inlet of the chamber, A powered actuated air transfer means coupled to the processing device for propelling the comminuted material particles in response to the velocity of the air passing through the outlet of the chamber. This device provides efficient separation of ground material with minimal power consumption.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS This apparatus is equipped with a material crushing mechanism (not shown,
It is shown in a vertical cross-section in FIG. 1 to have a base housing 10 which contains a roller grinding mechanism similar to that shown in FIG. 1 of US Pat. No. 4,522,343.
Grinding mechanism housing 11 is associated with a bustle 12 that allows air to enter the grinding mechanism. The material to be crushed is introduced at the feeder gate 13 and the gearbox 1
Power is input by the driven shaft 14 of No. 5.

The outlet end 16 of the crushing mechanism base housing 10 is connected to the inlet end of the casing structure 18 in any suitable manner. The casing structure 18 provides a chamber for separating the material after the material is crushed by a crushing mechanism to be finely divided. The crushing mechanism itself plays no role in the present invention. The casing structure has an outlet hood 19 which collects the proper size of comminuted material for transfer to the point of use or storage if not used directly. The chamber structure 18 houses a gearbox 20 that is connected to a power input shaft 21 that is connected to an outer shaft 22 of a prime mover (not shown). Gear box 20
Has an output shaft 23 with a hub 24,
4 carries a rotor disk 25 with a plurality of blades 26 (only two shown). These blades extend radially outwardly from the hub 24 so that their tips 27 move to sweep near the inner surface of the liner 28A supported by the chamber wall 28.

The shaft 23 extends upwardly so as to connect to a disk 29 which is spaced above the disk 25. The disk 29 forms the closed bottom of a rotor cage 30 which rotates on a vertical axis perpendicular to the plane of rotation of the rotor disk 25. The disk 29 includes a plurality of bar members 3
1 (see FIG. 2), these bar members are arranged in evenly spaced, circular rows to form the bars of the rotor cage 30. These bar members 31
The upper end is held by a stabilizing ring 32, which is
Is the inner end extension 3 of the hood structure 19 forming the outlet of the chamber
Surrounding three. Form of ring 32 (see FIG. 3)
Is configured to rotate in a snug fit about the inner end 33 to substantially eliminate flow of material in a bypass flow between the bar members.

The details of the rotor cage structure are better understood from FIG. Each bar member 31 is a tube 31 which may be substantially square (in cross section), the tube 31 using suitable welding techniques, as is well understood in the art. It is fixed at a predetermined position of 32. The bottom disc 29 forces the material to flow upward around the outside of the rotor cage structure, where the air flow through the hood 19 allows the material to move through the gap 31A. The rotating cage structure 30 includes a bar member 31.
The upper ring 32 that connects the upper ends of the
Fits snugly around the stationary hood extension 33 so that material particles do not bypass the cage.

Large particles that hit the flat surface 31B of the bar 31 are forcibly thrown into the space surrounding the rotor cage 30 and the casing 28 for further fineness.
It slides downward along the inner surface of the gravitational force. At the same time,
The lump 19 of the first crushed material is fed to the hood 19 through the conduit 35.
It is lifted by a suctioned air flow from an upper blower 34 connected to the. Of course, when the blower 34A is directly connected to the bustle 12 (see the blower 34A shown by a dotted line in FIG. 1), this air flow is generated by the upper blower 3A.
Lift material as 4 is aspirating. Large particles flowing through the inner ends of blades 26
It is not necessary to move through most of the material on the blade outside of the. The material at the outer ends of the blades is thrown toward the side wall 28 where it gathers at the side wall 28 for further refinement and slides down the side wall 28 under the effect of gravity. The effect on this is that the relatively dense mass does not have a dense mass to pass through the particles spaced from the second stage separation rotor cage because the relatively dense mass is collected adjacent to the wall 28. That's what it means.

From the above description, the material crushed by the crushing mechanism and moved into the material refining apparatus is gravitationally charged to collect the large and / or heavy particles at a predetermined position and to make them finer at this position. Obviously, it undergoes a first separation that is returned and a second separation in which some of the material is removed by a row of rotating bar members that are substantially equally spaced and of a predetermined size. It appears to be. The size of the spacing of the rotating bars determines the fineness of the material to be discharged from the device. Modifications can be devised from the above description without departing from the spirit of the invention described.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a comminution device, associated with a two-stage separation device.

FIG. 2 is a partial cross-sectional view of a cage performing one separation stage of ground material.

FIG. 3 is another partial cross-sectional view taken along line 3-3 of FIG.

FIG. 4 is a partial plan view taken along line 4-4 of FIG.

[Explanation of symbols]

 10 Base Housing 11 Grinding Mechanism Housing 12 Bustle 13 Feeder Gate 18 Casing Structure 19 Hood Structure 24 Hub 25 Rotor Disc 29 Disc 30 Rotor Cage 31 Bustle Member

Claims (5)

[Claims] 1. A device for treating output material from a power-actuated comminution device to separate the comminuted material in association with the power-operated comminution device to obtain a desired substantially uniform fineness particle output. A device for: (a) a chamber having an inlet and an outlet connected to the crushing device for receiving the output of the crushed material from the crushing device; (b) a power actuated drive shaft in the chamber; (c) Particles of excessive size are thrown outward by centrifugal force in the chamber and returned to the crushing device by gravity in order to make it even finer, and to perform the first separation stage of the crushed material, it is rotatable in the chamber, A bladed rotor connected to the drive shaft, and (d) a rotor cage connected to the drive shaft positioned adjacent the outlet of the chamber for performing another separation stage of ground material. And the rotor cage has means for passing crushed material particles of a predetermined size to the outlet of the chamber, and (e) creates an air flow through the inlet of the chamber to pass through the outlet of the chamber. A powered actuated air transfer means coupled to the processing device for propelling the crushed material particles in response to the velocity of the air. 2. The air moving means creates an air flow through the rotor with blades and into the rotor cage, whereby the rotor with blades performs a first separation stage,
The apparatus according to claim 1, wherein the rotor cage performs a second separation stage. 3. The bladed rotor moves in a plane perpendicular to the drive shaft, and the rotor cage rotates on an axis perpendicular to the plane of the bladed rotor. The device according to. 4. The rotor cage comprises a series of bar members arranged in circular rows, the bar members being retained at one end by a disk and at the other end by a circular ring. Claim 1, characterized in that
The apparatus according to 2 or 3. 5. The bar member provides a flat particle deflecting surface for air flow for deflecting oversized particles in either direction of rotation of the drive shaft. The device according to claim 4.